v8.4.0

• #1241 Update generated code
  • Add InvoiceLineItem.modify method.
• #1244 Add TaxIds API
  • Add support for create, retrieve, delete, and list methods on resource TaxId
  • The instance_url function on resource TaxId now returns the top-level /v1/tax_ids/{id} path instead of the /v1/customers/{customer}/tax_ids/{id} path.
• #1243 Remove http client base
• #1242 Testing: unify http client mock

See the changelog for more details.